Power USB hub from psu

**meyer64** · 03-11-2005, 08:03 PM

I have seen that several people are powering USB hubs off the 5v line from thier psu. is there any beneift of doing this over a bus powered hub? Does running the hub right off the psu draw more power than a bus powered hub would?

I have been looking for a 12v -> 5v adapter that can handle 2 amps for my hub, but cant find any. I might run it off my psu, but i dont want any unneeded draw on the psu.

**stevieg** · 03-11-2005, 08:05 PM

Originally Posted by meyer64

I have seen that several people are powering USB hubs off the 5v line from thier psu. is there any beneift of doing this over a bus powered hub? Does running the hub right off the psu draw more power than a bus powered hub would?

I have been looking for a 12v -> 5v adapter that can handle 2 amps for my hub, but cant find any. I might run it off my psu, but i dont want any unneeded draw on the psu.

It wont use any more power than running off the bus. You are best running it off the PSU and putting a suitable fuse in-line

**meyer64** · 03-11-2005, 08:35 PM

my hub is capable of being powered externally or by the bus. if the power is comming from the psu anyway, what difference does it make?

**stevieg** · 03-11-2005, 08:42 PM

Originally Posted by meyer64

my hub is capable of being powered externally or by the bus. if the power is comming from the psu anyway, what difference does it make?

There is only a certain amount of current that you can draw from the bus.

**maxxell** · 03-13-2005, 11:33 PM

So does anyone know how to power a powered USB hub off a molex or some other line from the power supply rather than through the bus? I got a hub that can pull either from the bus or a power line and I'd prefer to use the power line because bus power sucks, I've already maxed it out using too many devices and I'm hoping drawing straight from the Opus rather than through the bus will help.

**stevieg** · 03-14-2005, 05:55 AM

Originally Posted by maxxell

So does anyone know how to power a powered USB hub off a molex or some other line from the power supply rather than through the bus? I got a hub that can pull either from the bus or a power line and I'd prefer to use the power line because bus power sucks, I've already maxed it out using too many devices and I'm hoping drawing straight from the Opus rather than through the bus will help.

Yes what does it say is the power in (or what is the wall adapter voltage)

**acura cl** · 03-14-2005, 03:08 PM

could i connect my usb hub to my ITPS?

thanks.

**maxxell** · 03-14-2005, 05:14 PM

Originally Posted by stevieg

Yes what does it say is the power in (or what is the wall adapter voltage)

Couldn't tell ya. I'm on break so I'm not home. The box for the hub is home. Why does that matter, by the way?

**Peoples** · 03-14-2005, 05:18 PM

if its not 5 or 12 volts, then your **** out of luck

**mashina** · 03-14-2005, 05:19 PM

I was thinking about something similiar... I have M1-atx and one dc-dc psu (not using now) .. what about power usb hub from the second non cranking suitable ps?